JPS5939082B2 - top link connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a top link connection device used when attaching a work machine to the rear of a tractor body via a three-point linkage mechanism, and the present invention relates to a top link connecting device that is used when attaching a work machine to the rear of a tractor body through a three-point link mechanism. This allows for reliable connection to the .

When a working machine such as a rotary device is attached to the rear of a tractor body, a three-point linkage mechanism is exclusively used because it is easy to control the attitude of the working machine.

However, the conventional three-point linkage mechanism, especially the attachment and detachment of the top link and the working machine, is very complicated.

That is, on the lower link side, fit the ball joint at the rear end of the lower link from the side onto the lower link pin protruding from the lower link mounting base, and insert the retaining pin into the protruding end of the lower link pin. It is relatively easy to connect, but
For the top link side, position the ball joint at the rear end of the lower link between the upper ends of the top mast installed on the work machine, align the pin holes of both, and then insert the top link pin across them. It has to be inserted, and handling when attaching and detaching is very complicated.

The present invention solves these conventional problems and is characterized by the fact that the work machine is connected to the tractor body via a three-point linkage mechanism consisting of a top link and a pair of left and right lower links. In the case where the lower link is raised and lowered by the hydraulic system on the tractor body side, a retaining part is provided on the top side of the top mast on the working machine side, and a retaining part is installed on the rear end of the top link, and a top link pin provided in the lateral direction that can be placed in the lower link and engages with the retaining portion when the work machine rotates around the rear end of the lower link;
The top mast is provided with a presser member that is rotatable so as to sense the top link pin when the top link pin engages with the retainer and hold the top link pin in the retainer, and the presser member engages in the retainer position. The present invention is provided with a locking member that can be releasably locked.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figure, 1 is a tractor body, 2 is a hydraulic system for lifting and lowering a working machine, and has a pair of lift arms 3.

4 is a top link mounting base. Reference numeral 5 denotes a rotary device as a working machine, which is driven from the tractor body 1 side via a universal joint shaft 6.

Reference numeral 7 denotes a three-point linkage mechanism for towing and mounting the rotary device 5 behind the tractor graft 1, which is composed of one top link 8 and a pair of left and right lower links 9, each of which is lifted via a lift rod 10. It is connected to arm 3.

The top link 8 has ball joints 11 and 12 at both front and rear ends, and the front ball joint 11 is pivotally connected to the top link mount 4 by a pivot pin 13, and the rear ball joint 12 has a ball joint 11 and a ball joint 11, shown in FIG. As shown in FIG. 3, a top link pin 14 is inserted in a T-shape, and the top link pin 14 is set to a length that allows it to be placed on the top mast 15 of the rotary device 5 while facing in the horizontal direction. has been done.

The top mast 15 is erected on the side of the rotary device 5 in a forward-leaning posture, and the top link pin 14 is placed on the top mast 15 at the upper end of the rear side.When the rotary device 5 is raised, A retaining portion 16 is cut out so that the top link pin 14 is engaged therewith.

Reference numeral 17 denotes a holding member that holds the top link 14 engaged with the retaining portion 16, and a notch 18 into which the top link pin 14 is fitted.
There are a pair of left and right parts inside the upper end of the top mast 15, each of which is rotatably supported on the top mast 15 by a pivot shaft 19, and integrally connected by a connecting plate 20 at the free end side. There is.

This pressing member 17 is urged toward the stopper 22 by a spring 21, and is held in a position where the top link pin 14 can easily fit into the notch 18.

It goes without saying that the connecting plate 20 is located at a position where it does not come into contact with the top link 8.

Reference numeral 23 designates a locking member for locking the presser member 17 in the holding position shown in FIG. It is urged to protrude.

This locking member 23 is interlocked and connected to an operating lever 27 attached to the vicinity of the driver's seat 26 on the tractor body 1 via a bowden wire 25, and can be moved in and out by operating the operating lever 2T from the driver's seat 26 side. be.

Next, the effect will be explained.

When attaching the rotary device 5 to the tractor body 1 via the three-point linkage mechanism 7, first connect each lower link 9 to the lower link mounting base of the rotary device 5, and then rotate the top link 8 rearward. The top link pin 14 at the rear end is placed on the top mast 15 as shown in FIG.

Of course, at this time, the presser member 17 is locked in the standby position by the stopper 22 as shown in FIG. is retracted by the operating lever 27.

Therefore, the hydraulic device 2 is operated in the upward direction, and the lower link 9
When the rotary device 5 is raised, the rotary device 5 rotates rearward in the direction of the arrow C using the rear end of the lower link 9 as a fulcrum, so the top link pin 14 moves upward on the top mast 15 in the direction of the arrow B. At the same time that the holding member 17 is slid relative to the other and fitted into the notch 18 of the holding member 17, the holding member 17 rotates around the pivot shaft 19 in the direction of the arrow C, and the top link pin 14 is rotated as shown in FIG. It engages with the retaining portion 16 and is held by the holding member 17.

Therefore, next time, if the operating lever 27 is released, the spring 25
The lock member 23 protrudes toward the presser member 1T,
Since this presser member 17 is locked unrotatably, the top link pin 14 is held within the engaging portion 16 at the upper end of the top mast 15, and the top link 8 and top mast 15
The connection with is completed.

When removing the top link 8 from the top mast 15,
After removing the lock member 23, the entire rotary device 5 may be slightly rotated in the direction of the arrow d, or after the lower link 9 and the rotary device 5 are disconnected, the tractor body 1
may be moved slightly backward, and the release operation at these times is the reverse of the connection.

As described above, in the present invention, the top mast 1 on the work machine 5 side
A retaining part 16 is provided on the upper surface side of the top link 8 and can be placed on the upper surface side of the top mast 15 and can be mounted on the rear end of the top link 8.
A top link pin 14 that engages with the retaining portion 16 when the lower link 9 rotates around the rear end portion of the lower link 9 is provided in the lateral direction,
The top link pin 14 is attached to the top mast 15 at the engaging portion 1
6, the top link pin 14 is detected and the holding member 17 is rotatable so as to be held in the retaining portion 16, and this holding member 1T is removably locked in the holding position. Since the locking member 23 is provided, after placing the top link pin 14 on the top mast 15, by operating the hydraulic device 2 in the upward direction to lift the lower link 9, the rear end of the lower link 9 can be The work machine 5 rotates around the top link pin 14 and the engaging part 16 engages with the holding member 1.
7. The locking member 23 holds the top link pin 14 irremovably.

Therefore, it is possible to easily connect the top link 8 to the top mast 15, and handling at the time of attachment and detachment becomes very easy.

In addition, it is sufficient to use a normal top link side and provide a top link pin 14 horizontally at the rear end.
Since only the top mast side needs to be improved, the top link can be used for various types of work equipment as before.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the whole, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is A of FIG.
-A arrow view and FIG. 4 are operation explanatory diagrams. 1... Tractor body, 5... Rotary device, 8...
・Top link, 14...Top link pin, 15・
... Top mast, 16... Engagement part, 17... Pressing member, 23... Locking member.

Claims (1)

[Claims] 1. The work implement 5 is attached to the tractor body 1 via a three-point link mechanism 7 consisting of a top link 8 and a pair of left and right lower links 9, and the lower links 9 are raised and lowered by the hydraulic device 2 on the tractor body 1 side. A retaining part 16 is provided on the upper surface side of the top mast 15 on the work equipment 5 side, and the retaining part 16 is provided on the rear end of the top link 8 so that it can be placed on the upper surface side of the top mast 15 and the work equipment 5 can be attached to the lower link 9. A top link pin 14 that engages with the retaining portion 16 when rotated around the rear end is provided in the lateral direction, and a top link pin 14 that engages with the engaging portion 16 when the top link pin 14 engages with the engaging portion 16 is provided on the top mast 15. A presser member 17 that is rotatable to sense the top link pin 14 and hold it in the retaining portion 16, and a lock member 23 that releasably locks the presser member 17 at the holding position are provided. A top link connecting device featuring: